Elevator safety stop



April 26, 1927. G. ORDOG ELEVATOR -SAFETY STOP Filed Nov. 24. 1924 INVENTOR 27.36@ Ona/03 ATTORNEY Patented Apr. 26, 1927.

UNITED STATES P'VEEN` GERGELY oRDoG, or ELLIS ISLAND, NEW volait.v

ELEVATOR- sAEE'rY savor.

Application led November V24, 1924. Serial No. 751,737. y

This invention relates to safety devices Vfor elevators that are applied to the latter to prevent accident in the event Vof the supporting cable breaking, the invention having for an object the provision of asimple and eiiicient safety device of this sort.

For further comprehension Vof the 'invention, and of the objectsl andl advantages thereof, reference will be had to the following description and accompanying drawing, and to the appended claim Vin which the various novel features of the invention are more particularly set forth.

Fig. 1 of the drawing is a side 'view showing my safety device applied to an elevator.

Fig. 2 is an end view thereof.

Fig. 3 is a plan view. Y Y Fig. 4 is a fragmentary transverse sectional' view taken on the line 4-4 ofv Fig. 2 and showing the parts in a different position.

The elevator to which my invention is here shown as applied isof the freight carrying type and comprises an open frame including a longitudinal top bar 10 that has fixed to the ends thereof the brackets 11 `which carry flanged rollers 12 that engage thel vertical guide posts 13. This bar 1() has fixed thereto transverse lelements such as 15 from which depend the members 16 that support a platform 17, this platform being suitably arranged at its ends to engage the guide posts 13. Extending freely through a suitable vertical aperture formed in the bar 10 midway between the ends of the latter is a bolt 20 having a yflattened and vertically elongatedy head 21 on its upper end, this head having connected thereto the cable 22 by which the elevator is suspended. The bolt 20 has a nut ,23 on its lower end and between this nut and the bottom of the bar 10 an expansion spring 24 is coiled around the bolt and forms a resilient support for the elevator.

Rotatably vsupported in the transverse elements 15, and extending parallel to the bar 10 one on each side thereof, are the shafts 28. These shafts have pawls 29 iixed to their opposite ends that are adapted to engage ratchet toothed racks 30 'formed on opposite sides of the guide posts 13, the teeth of these racks facingupwardly, so that the elevator is supported therebywhen the pawls engage therewith in the event of the cable 22 breaking. The pawls are normally urged into engagement vwith the racks 30 by.` ymeans of the helical springs l32 that areV coiled around the shafts 28. These springs are attached at one endy to the transverse 1 l members 15 before mentioned, andat theirf opposite ends to arms33 lixed to the shaft 28, so as to impart a rotary urge to the latter.

The shafts 28 have mounted thereon, mid.- way vbetween their ends so as to be juxta posed to the bolt 20, the arms 35 that diverge upwardly from one another and have pivotally connected to their upper ends the links 36 that are connected'also to the head 21 of the bolt 20,k the links inclining upwardly fromthe arms 35 to engage Ythe head 21 when the parts are in .normal position, so `that downward movement of the bolt when the cable 22 breaks acts to impart a rocking movement to the arms 35 to swing Ythe lpawls 29 against the racks. This rock! ing movement of the shafts 28 may be limited by means of the arms that engage the bar 10. In the event ofthe cable 22 breaking,

`the springs 24 and 32 act in vconjunction to move vthe bolt20 downward with respect to the elevator, thus swinging'the pawls 29' into engagement with the racks 30 and pre venting the elevator from falling. It will be understood that the spring that acts on the cable is of sufficient strength to move the latter irrespective of the point at which the break may occur. It will be clear that upon a break occurring in cable 22, the spring 24 will come to action andmcve rod 2() causing the links 36 which are connected tothe head'21V of the rod -or bolt 20 kto i assume the position illustrated in Figure 4, and to rotate Athe shafts 28 in conjunction pawls being engageable with the racks, a Y cable connected to the elevator car for oper-V` ating purposes, means associated With the to each arm, the said springs normally helpoable and the elevator ear for engaging the ing to urge the paWls into engagement With pawls against the racks upon the breaking the racks.

of the cable, arms xecl lt@ the said Shadi-ts, yIn testimony whereof. I have affixed my and springs'co-axial on the shafts, one end signature.y

of yeach spring being fixed to a stationary part of vthe elevator car, and theother end GERGELY oRDoG. 

